Concurrent removal and accumulation of heavy metals by the three aquatic macrophytes

被引：282

作者：

Mishra, Virendra Kumar ^{[1
]}

Tripathi, B. D. ^{[1
]}

机构：

[1] Banaras Hindu Univ, Ctr Adv Studies Bot, Varanasi 221005, Uttar Pradesh, India

来源：

BIORESOURCE TECHNOLOGY | 2008年 / 99卷 / 15期

关键词：

heavy metals; aquatic macrophytes; phytoremediation; hyperaccumulation; toxicity;

D O I：

10.1016/j.biortech.2008.01.002

中图分类号：

S2 [农业工程];

学科分类号：

0828 ;

摘要：

Under the present investigation effectiveness of three aquatic macrophytes Pistia stratioies L. (water lettuce), Spirodela polyrrhiza W. Koch (duckweed) and Eichhornia crassipes were tested for the removal of five heavy metals (Fe, Zn, Cu, Cr and Cd). These plants were grown at three different concentrations (1.0, 2.0 and 5.0 mg l(-1)) of metals in laboratory experiment. Result revealed high removal (> 90%) of different metals during 15 days experiment. Highest removal was observed on 12th day of experiment, thereafter it decreased. Results revealed E. crassipes as the most efficient for the removal of selected heavy metals followed by P. stratiotes and S. polyrrhiza. Results from analysis confirmed the accumulation of different metals within the plant and a corresponding decrease of metals in the water. Significant correlations between metal concentration in final water and macrophytes were obtained. Plants have accumulated heavy metals in its body without the production of any toxicity or reduction in growth. Selected plants shown a wide range of tolerance to all of the selected metals and therefore can be used for large scale removal of heavy metals from waste water. (c) 2008 Elsevier Ltd. All rights reserved.

引用

页码：7091 / 7097

页数：7

共 26 条

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